Make atmel-dfu and chibios-dfu flashing behave more like caterina flashing. (#12552)

This commit makes atmel-dfu and chibios-dfu bootloaders retry to detect the bootloader
every 0,5 seconds (now configurable via the BOOTLOADER_RETRY_TIME makefile variable),
and a period is printed after every try. This is a much more pleasant behaviour than
the 5s retry timeout.

1 files changed, 9 insertions, 4 deletions

diff --git a/tmk_core/chibios.mk b/tmk_core/chibios.mk
index cdf9ba649..97299b7d3 100644
--- a/tmk_core/chibios.mk
+++ b/tmk_core/chibios.mk
@@ -341,10 +341,15 @@ ST_LINK_CLI ?= st-link_cli
 ST_FLASH ?= st-flash
 
 define EXEC_DFU_UTIL
-        until $(DFU_UTIL) -l | grep -q "Found DFU"; do\
-                printf "$(MSG_BOOTLOADER_NOT_FOUND)" ;\
-                sleep 5 ;\
-        done
+        if ! $(DFU_UTIL) -l | grep -q "Found DFU"; then \
+                printf "$(MSG_BOOTLOADER_NOT_FOUND_QUICK_RETRY)" ;\
+                sleep $(BOOTLOADER_RETRY_TIME) ;\
+                while ! $(DFU_UTIL) -l | grep -q "Found DFU"; do \
+                        printf "." ;\
+                        sleep $(BOOTLOADER_RETRY_TIME) ;\
+                done ;\
+                printf "\n" ;\
+        fi
         $(DFU_UTIL) $(DFU_ARGS) -D $(BUILD_DIR)/$(TARGET).bin
 endef